/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.ssau.customerManagement.servlets;

import java.io.IOException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ru.ssau.customerManagement.controller.ValuesValidator;
import ru.ssau.customerManagement.controller.XMLHelper;
import ru.ssau.customerManagement.ejb.ControllerBean;
import ru.ssau.customerManagement.model.entities.Customer;

/**
 *
 * @author illabefat
 */
@WebServlet(name = "CustomerServlet", urlPatterns = {"/CustomerServlet"})
public class CustomerServlet extends HttpServlet {

    private static final Logger logger = LoggerFactory.getLogger(CustomerServlet.class);
    
    private ControllerBean controllerBean;

    public CustomerServlet() {
        InitialContext ctx;
        try {
            ctx = new InitialContext();
            controllerBean = (ControllerBean) ctx.lookup("java:global/EnterpriseApplication1/EnterpriseApplication1-ejb/ControllerBean");
        } catch (NamingException ex) {
            logger.error("Some error ocurred with JNDI", ex);
            throw new RuntimeException("Some error ocurred with JNDI", ex);
        }
    }
    
    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        HttpSession session = request.getSession();
        try
        {
            String type = request.getParameter("type");
            if ("update".equals(type))
            {
                Long id = ValuesValidator.getCorrectId((String)request.getParameter("id"));
                Customer customer = controllerBean.getCustomer(id);
                String customerXML = XMLHelper.jaxbToString(customer);
                session.setAttribute("customerXML", customerXML);
                response.sendRedirect("customer.jsp?type=update");
            }
            else if ("create".equals(type))
            {
                response.sendRedirect("customer.jsp?type=create");
            }
        }
        catch (Exception e)
        {
            session.setAttribute("error", e.getMessage());
            response.sendRedirect("error.jsp"); 
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
